You can delete one or more of the last versions of a project if needed. This can be done from the My Projects page if you are the project creator or are a member of a role that allows managing the project.

If you want to delete the last version of the Earth project, log in as the demo user and click My Projects. Click the Manage icon () and open the Versions tab to view the list of versions created for this project:

The Versions of the Earth project

Check the box next to the version you want to delete. All versions created after the version you selected will also be checked. Click the Delete button to reach a summary page where you can confirm which versions will be deleted, and click Confirm to launch the delete process.